Safety stop for spindles



P 1959 G. SCHOLLKOPF 2,902,818

SAFETY STOP FOR SPINDLES Filed March 20, 1957 2 Sheets-Sheet l p 8, 1959 G. SCHCSLLKOPF 2,902,818

SAFETY STOP FOR SPINDLES Filed March 20, 1957 2 Sheets-Sheet 2 4&

Fig. 3

United States Patent The present invention relates to a safety stop for spindles of textile spinning frames or the like, the general object of the invention being to provide means for securing the spindles in their position in the spinning rail when the cops or other yarn receivers are removed therefrom. Another object of :the invention is to provide a safety stop: mechanism which is simple and practical in cons'truction,strong and reliable in use, relatively inexpensive to manufacture, and otherwise well adapted for the purpose for which the same is intended.

-It is another object of the present invention to provide a safety stop for spindles of textile spinning frames which comprise-a safety stop mechanism which is tiltable against the action ofa compression spring about an edge formed by'a leg of the stop arranged between the spinning rail and the .whorl and by a surface extending in a plane running transversely to the spindle axis.

With these and other objects in view which will become apparent in the following detailed description, the present invention will be clearly understood in connection-with the accompanying drawings, in which: Figure 1 is a part sectional side elevational view of the safety' stop mechanism constructed in accordance with the present invention;

Fig.2 is a sectional 'view taken along line 11-11 of Fig; l; and 7 U Fig. 3 is a fragmentary sectional elevational view of another embodiment of the safety stop mechanism.

In the construction illustrated in the drawing, the

spindle 1 is rotatably mounted in the bolster 4 as well as removable in directionof the arrow B. The stop 3 comprising a hook-shaped operating finger 3b, a projection 3a, anda leg 3d is the mainpart of the safety stop mechanism. Thewhorl 1c of the spinning spindle 1 has a stepped shoulder-1a into the step 2 of which extends hbiihqokphapedportion 3b.with itsprojection 3a, so that the stop 3 is turnable about a horizontally extending axis AA (Fig. 2). The stop 3 is tiltable against the action of the compression spring 5 about an edge 30 which is formed by the leg 3d of the stop 3 arranged between the spinning rail 7 and the whorl 1c and by a surface extending in a plane running transversely to the spindle axis. The stop 3 is held by a bolt 8 and guided by two gripping surfaces of a pocket 9 in the flange 4a of the bolster 4 supported on the spinning rail 7, so that the bolt 8 extends through an elongated hole in the leg 3d.

The driving belt 10 drives the spindle 1 which is in known manner rotatably mounted as well as axially removable in direction of the arrow B in the hollow bolster 4 by means of a spindle blade 1d extending into the latter. The projection 3a prevents in the position shown in Fig. 1 accidental removal or raising of the spindle 1 in direction of the arrow B when only the cop or other yarn receiver (not shown) supported on the spindle 1 is not to be raised therefrom in direction of the arrow 13, since the shoulder 1b of the whorl 1c abuts the projection 3a of the stop 3, upon raising the spindle 1 slightly from its support on the spinning rail 7.

Should it be desired to remove the spindle 1 after it has been stopped from the bolster 4 in direction of'th'e arrow B, the stop 3, the projection 3a of which is a portion of the operating finger 3b, is then tilted in direc-' tion of the arrow C about the horizontally extending tilting axis AA formed by the edge 30 of the leg 3d,

which tilting is effected by finger-tip pressure exerted upon the operating finger 3b in direction of the arrow D. This tilting is made possible by the elongated hole 6 in the leg 3d, the entire stop being non-positively secured by the bolt 8 through the action of the compressionspring 5 and held by two gripping surfaces of the pocket 9 in the flange 4a of the bolster 4. The spindle 1 can now be removed in direction of the arrow B, as the shoulder 1bv of the whorl 1c can now be moved freely past the projection 3a of the stop 3.

Instead of the compression spring 5 there may be used a rubber spring, or the like, filling the pocket be-f tween the spindle rail 7 and the flange 4a such that no fly can collect therein (Fig. 3).

An essential feature of the present invention resides'in having the bolt 8 as well as the spring 5, by means of which the stop 3 is suspended-on the flange 4a of the bolster 4, arranged in the pocket 9 which is cast or machined in the flange 4a. In contrast to known spring hook arrangements, 1 the bolt 8 is released of power, as. on raising the spindle while removing the cop or other; yarn receiver in direction of the arrow B. The power is taken up by the flange 4 1 by means of the stop 3. In addition, the present invention secures the advantage that the bolt is securely arranged within the pocket. A' gap of approximately 0.5 mm. in width is provided be-i tween the spinning rail 7 and the head of the bolt 8 so. that the bolt after but half a turn would already'abuf against the spinning rail 7, if it should happen that in,

, the course of time the bolt becomes loose owing to vibra-E tion of the spinning frame.

Accidental, self-tilting of the safety stop 3 is even then impossible when the cop or other yarn receiver is pulled off from the spindle with considerable force. On the other hand, tilting at will can readily be effected by applying finger tip pressure indirection of the arrow', D upon the upper end of the safety stop 3 which is pref erably integral and bent from strip steel. Over and above that the present invention assures perfect return of the safety stop 3 to its operating position when the spindle 1 is slippedagain on the spindle blade 1d mounted as part thereof in the bolster 4, after it has been removed therefrom. g Y

-A further 'advantage'of the invention resides in'the' fact that the hook 3a, 3b possesses but a very small surface where fly or lint could collect and therefore can be kept clean easily, as besides this hook the safety stop mechanism has no other parts projecting over the edge of the whorl. This results in the additional advantage that the safety stop mechanism may just as well be located at the front or the rear of the spindle with respect to its location in the spinning frame. When placed on the side facing the operator so as to be operative on the stepped shoulder of the whorl, the hook may be located so low that interference with the belt for driving the whorl is impossible.

It is thought from the foregoing description that the advantages and novel features of the invention will be readily apparent.

It is to be understood that changes may be made in the construction and in the combination and arrangement of the several parts provided that such changes fall within the scope of the appended claims, and while two embodiments of the present invention are disclosed, it is to be understood that these embodiments are given by example only and not in a limiting sense, the scope of the present invention being determined by the objects and the claims.

What is claimed is:

, 1. In a spinning. frame .or the like, a spinning rail, a spindle .unit comprising asplindle .blade and whorl having a stepped shoulder at its lower end and a bolster hav: ing ,a. flange thereon and mounted therewith onsaidspinning rail by'said spindle blade, .further including-a yarn receiver .secured to the upper portion of said spindle above said whorl, said flange of saidbolster definingia pocket, a safety stop mechanism mounted in said pocket and comprising a stop member bent from strip steel and including a hook-shaped portion at its upper end and a horizontal leg portion at its lower end, said leg portion extending into said pocket, and a resilientmember .disposed in said pocket and retaining said stop member in operative stopping position and permittingsaidstop mem berto assume an inclined inoperative position, and said hook-shaped portion of said stop protruding over'the stepped shoulder of said whorl so as to secure said spindle in its position and prevent it from raising when said yarn receiver is removed therefrom.

"2. 'In a spinning frame or the like, a spinning rail, a spindle unit comprising a spindle blade anda whorl having a stepped shoulder at its lower end and a bolster having a flange thereon and mounted therewith on said spinning rail by said spindle blade, further including a cop or other yarn receiver removably secured to the upper portion of said spindle above said whorl, said flange of said bolster defining a pocket, a :safety stop mechanism mounted in said pocket, and'saidsafety stop mechanism comprising a stop bent from strip steel and having a hook-shaped portion at its upper end anda horizontal leg at its lower end extending into said pocket and an elongated .hole in said horizontal leg and a screwthreaded bolt extending through said elongated hole and a resilient member mounted on the shank of said bolt, and said hook-shaped portion of said stop protruding over thestepped shoulder of said whorl so as to secure .said spindle in its position and prevent it from raising when said cop or other yarn receiver is removed therefrom.

31. In a spinning frame or thelike, a spinning-rail,a spindle unit comprising a spindle blade and awhorl having a stepped shoulder at its lower end and a bolster having a flange thereon and mounted'therewith on said spinning rail by said spindle blade, further including a cop or other yarn receiver removably secured to the upper portion of said spindle above said whorl, the'flange of said bolster defining a pocket having two lateral gripping surfaces on the side adjacent said spindle blade, a safety stop mechanism tiltably mounted in said pocket, and said safety stop mechanism comprising a stop bent from strip steel and having a hook-shaped portion at its upper end and a horizontal leg at its lower end extending into said pocket and an elongated hole in said hon: zontal leg and a holding means for non-positively holding said safety stop mechanism extending through said elongated hole and a resilient member retaining said safety stop in said pocket and the latter being tiltable against the action of said resilient 'member about a tilting axis formed by the outer transverse edge ofgsaid horizontal leg and by a surface extending in a plane running transversely to the axis of said spindle when finger-tippressure is exerted upon the hook-shaped portionof. said stop in a manner whereby said stop will'be held in its tilted position by the two gripping surfaces of said -pocketiin the flange of said bolster so as to render it inoperative when it is desired to remove said spindle from said spindle blade.

4. In a spinning frame or the like, a spinning rail, a spindle unit comprising arspindle blade. and'ia whorl ;having. a stepped shoulder at its lower endand :a bolster having a flange thereon and mounted therewithaonzsaid spinning rail by said spindle :blade, furtheriincludingga cop or other yarn receiver removably-ts'ecured r-to the upper portion of said spindle vabovesaicl WhOIEL'IhB. flange of said bolster defining ;-a pocket having two.lateral:g1 ipping surfaces on .the side adjacent said ,spindlebladqm safety stop mechanism tiltably mounted -:in ;said": pocket, and said safety stop mechanismcomprising a;.;stop ..bent from strip steel and having a hook-shaped.portion-.atrits upper end and a horizontal leg'at its lowenend; extending member about a tiltin axis formed by the;.outer';-trans-,

verse edge of said horizontal leg and bytafsurface'=extending in a plane running transversely-to the axisofzsaid spindle when finger-tip pressure is exerted upon. thehook: shaped portion of said stop inza manner wherebyisaid stop will be held in its tilted position by the twogripping surfaces of said pocket in the flange of rsaid :bolsterso: as

to render it inoperative when it is desired-to removetsaid spindle from said spindle blade.

References Cited in the file Of zthisgpatent v I UNITED STATES PATENTS 1,895,707 Edwards Ina-31, 1 933 FOREIGN PATENTS 425,076 7 7 Italy Sept. 19, 1947 

